ScienceAugust 15, 2026
noncommutative
non-kuhm-PYOO-tuh-tiv
Definition
Describing a system or operation where the order in which elements are combined or measured changes the outcome.
Etymology
Derived from the Latin 'non-' (not) and 'commutare' (to exchange or change). It entered mathematical and scientific discourse to describe operations, such as matrix multiplication, where changing the sequence of variables produces a different result.
In the news
In this article, noncommutativity refers to theoretical modifications in quantum mechanics where position and momentum operators do not commute, leading to measurable shifts in a crystal's thermodynamic properties.
Thermodynamic Effects Emerge In Snyder-de Sitter Einstein Crystals
Read the full article ↗Quantum Zeitgeist